同人类任何语言一样，Java为我们提供了一种表达思想的方式。如操作得当，同其他方式相比，随着问题变得愈大和愈复杂，这种表达方式的方便性和灵活性会显露无遗。

不可将Java简单想象成一系列特性的集合；如孤立地看，有些特性是没有任何意义的。只有在考虑“设计”、而非考虑简单的编码时，才可真正体会到Java的强大。为了按这种方式理解Java，首先必须掌握它与编程的一些基本概念。本书讨论了编程问题、它们为何会成为问题以及Java用以解决它们的方法。所以，我对每一章的解释都建立在如何用语言解决一种特定类型的问题基础上。按这种方式，我希望引导您一步一步地进入Java的世界，使其最终成为您最自然的一种语言。

贯穿本书，我试图在您的大脑里建立一个模型——或者说一个“知识结构”。这样可加深对语言的理解。若遇到难解之处，应学会把它填入这个模型的对应地方，然后自行演绎出答案。事实上，学习任何语言时，脑海里有一个现成的知识结构往往会起到事半功倍的效果。-Like any language with the human, Java provides us with a way to express ideas. If operating properly, as compared with other methods, with the problem has become larger and more complex, this expression of the convenience and flexibility will be shown.

Java simply can not imagine the series features a collection　such as isolation, some properties are not of any significance. Only consider the "design" rather than consider a simple coding can really feel the power of Java. In order to understand this way Java, it must first master the basic concepts of programming. This book discusses programming problems, why they become a problem, and Java methods to solve them. So, I explain each chapter are built on how to use language to solve a particular type of issue basis. This way, I hope to guide you step by step into the Java world, to eventually become your most natural language.

Throughout the book, I tried your brain to build a model- or a "knowledge structure." This will deepen the